114 UNITED STATES AND MEXICAN BOUNDARY. 
Hep.) Mountains east of San Diego; Parry. San Pasqual, California; Thurber, Schott. Dry 
ravines, Organ mountains, New Mexico; Bigelow, Wright, (1475.) These specimens of this 
well-marked and showy species, though not displaying such an ample panicle of flowers as do 
the Californian ones from Thurber and Mr. Wallace, evidently belong to the same species. It 
pertains to the section Cepocosmus. 
PENTSTEMON FENDLERI, Cray, in Bot. Pope’s Rep. р. 12, t. 5. Common apparently, from the 
Platte through New Mexico and the Rocky mountains to Chihuahua, (Wislizenus, No. 2 Э and 
brought by all the collectors. It is Fendler’s No. 576, and Wright’s 1473. (This clearly is 
not distinct from P. cyananthus, Hook. Bot. Mag., t. 4464, which was ي‎ when E 
P. Fendleri was characterized ; it must accordingly bear that name 72 s Z. £ =. 
PENiSTEMON GRACILIS, Nutt. Gen. p. 52. Near the Guadalupe river, above Victoria, Texas ; 
Schott. 
Pentstemon DIGITALIS, Nutt. in Trans. Amer. Phil. Soc. n. ser. 5, p. 181. Rio Hondo, Texas; 
Wright. 
PENTSTEMON BARBATUS, Nutt.; Benth. in РО. Prodr. 10, p. 329. Р. Torreyi, Benth.! l. c. p. 
324. Common in New Mexios; along the mountains; Fendler, (581,) Wright, (440, 1474); 
Bigelow, etc. Santa Cruz mountain; Captain E. K. Smith. We have this in cultivation from 
Mr. Wright’s seeds. It is hardy at Cambridge, and is taller (4 to 6 feet high) than the com- 
monly cultivated P. barbatus, as well as fuller-flowered ; the virgate panicle becoming 2 or 5 
feet in length, and bearing a long succession of fine scarlet blossoms, in some plants of the 
most brilliant hue. The calyx-segments are either marginless or slightly margined. The 
lower lip of the corolla at the throat is bearded, either somewhat copiously or sparingly, or in 
some plants the beard wholly disappears, so that the name barbatus is not characteristic of this 
species. But that all our forms are specifically identical with the old Chelone barbata I cannot 
doubt. In establishing his P. Torreyi, Mr. Bentham, who is generally so very accurate, has 
made two mistakes; the first, into which he was naturally led by the imperfection of the 
original specimens, was in referring his plant to the section Cepocosmus, and comparing it with 
P. imberbis, whereas it is a genuine Elmigera, having the upper lip erect, concave, and 
moderately two-lobed, the lower 3-parted and reflexed ; the second in attributing to P. barbatus 
a bearded sterile filament, whereas it has always been described as with a naked one, con- 
formably to the distinction formerly taken in this respect between Chelone and Pentstemon. 
PENTSTEMON BARBATUS, Var. PUBERULUS. (Guadalupe сайоп, May, 1851; Thurber. In every 
respect it is P. barbatus, but with a minute pubescence on the stem and leaves. 
PENTSTEMON BACCHARIFOLIUS, Hook. Bot. Mag., t. 4627. Rocky bluffs at the Big Bend of the 
San Pedro river, Texas; Wright, (439, 1479.) This showy species has been found only by 
Mr. Wright, who discovered it in 1849. From seeds gathered by him it has been raised both 
in England and in the Cambridge Botanic Garden. Overlooking Hooker’s publication of the 
species, I had named it P. Grahami, in compliment to Colonel Graham, United States Topo- 
graphical Engineers, under whose command Mr. Wright was when he, for the second time, met 
with the plant ; but the name has not appeared in print, so far as І am aware. The figure in 
the Botanical Magazine does feeble justice to the very deep and carmine corolla, and represents 
the plant as coarser and the leaves as considerably larger than usual. The latter in the wild 
specimens are only 1—1 inch long, and very thick and firm. Far from being “annual?” the 
plant is shrubby. The upper lip of the corolla is erect or at length somewhat recurved; the 
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